Unfortunately, I had to send back the unit. After formatting I have copied some files on the stick. This worked on quite well and quickly, but I've noticed during the copying process, that the stick was pretty hot. The next morning I wanted to go back to access the copied files, but the drive should be re-formatted. The stick has not been recognized at both the Windows computer and on a MacBook Pro. In addition, I find the process very badly. When pulling out from the USB port I trim the sticks in their hands.